Low-Noise, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements - ADS1299

ADS1299 (ACTIVE)

Low-Noise, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements

 

Description

The ADS1299 is a low-noise, multichannel, simultaneous-sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. The ADS1299 incorporates all commonly-required features for electroencephalogram (EEG) applications.

With its high levels of integration and exceptional performance, the ADS1299 enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.

The ADS1299 has a flexible input multiplexer per channel that can be independently connected to the internally-generated signals for test, temperature, and lead-off detection. Additionally, any configuration of input channels can be selected for derivation of the patient bias output signal. The ADS1299 operates at data rates from 250 SPS to 16 kSPS. Lead-off detection can be implemented internal to the device, either with an external pull-up or pull-down resistor or an excitation current sink or source.

Multiple ADS1299 devices can be cascaded in high channel count systems in a daisy-chain configuration. The ADS1299 is offered in a TQFP-64 package specified from –40°C to +85°C.

Features

  • Eight Low-Noise PGAs and Eight High-Resolution Simultaneous-Sampling ADCs
  • Very Low Input-Referred Noise:
    1.0 µVPP (70-Hz BW)
  • Low Power: 5 mW/channel
  • Input Bias Current: 300 pA
  • Data Rate: 250 SPS to 16 kSPS
  • CMRR: –110 dB
  • Programmable Gain: 1, 2, 4, 6, 8, 12, or 24
  • Unipolar or Bipolar Supplies:
    • Analog: 4.75 V to 5.25 V
    • Digital: 1.8 V to 3.6 V
  • Built-In Bias Drive Amplifier,
    Lead-Off Detection, Test Signals
  • Built-In Oscillator
  • Internal or External Reference
  • Flexible Power-Down, Standby Mode
  • Pin-Compatible with the ADS1298IPAG
  • SPI™-Compatible Serial Interface
  • Operating Temperature Range: –40°C to +85°C

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Parametrics Compare all products in Electrocardiogram (ECG)

 
# Input Channels
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Integrated Features
Gain Drift (Typ) (ppm/degC)
Architecture
Gain Error (Typ) (%)
Input-referred Noise (Typ) (uVpp)
IDVDD Supply Current (Typ) (mA)
Digital Supply (Max) (V)
Digital Supply (Min) (V)
Reference Mode
Interface
Offset Error (Typ) (uV)
Rating
Operating Temperature Range (C)
Package Group
IAVDD Supply Current (Typ) (mA)
INL (Typ) (ppm)
Offset error drift (Typ) (uV/C)
PGA Gain (Typ) (V/V)
Power/Channel (Typ) (mW)
Approx. Price (US$)
ADS1299 ADS1191 ADS1192 ADS1291 ADS1294 ADS1296 ADS1298
8     1     2     1     4     6     8    
4.75     2.7     2.7     2.7     2.7     2.7     2.7    
5.25     5.25     5.25     5.25     5.25     5.25     5.25    
Daisy-Chainable
GPIOs
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
2     5     5     2     5     5     5    
Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma    
0.1     0.5     0.5     0.1     0.2     0.2     0.2    
1     24     24     8     3     3     3    
0.5     0.75     0.75     0.75     0.5     0.5     0.5    
3.6     3.6     3.6     3.6     3.6     3.6     3.6    
1.8     1.7     1.7     1.7     1.65     1.65     1.65    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI    
60     15     15     100     500     500     500    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85
0 to 70    
-40 to 85
0 to 70    
-40 to 85
0 to 70    
TQFP     TQFP
VQFN    
TQFP
VQFN    
TQFP
VQFN    
NFBGA
TQFP    
NFBGA
TQFP    
NFBGA
TQFP    
7.14     0.2     0.2     3     2.75     2.75     2.75    
8     15     15     2     8     8     8    
0.09     5     5     2     2     2     2    
1
2
4
6
8
12
24    
1
2
3
4
6
8
12    
1
2
3
4
6
8
12    
1
2
3
4
6
8
12    
1
2
3
4
6
8
12    
1
2
3
4
6
8
12    
1
2
3
4
6
8
12    
5.125     0.335     0.335     0.35     0.75     0.88     0.75    
36.00 | 1ku     2.95 | 1ku     3.85 | 1ku     3.75 | 1ku     11.95 | 1ku     17.95 | 1ku     23.95 | 1ku    

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